Source code for textattack.transformations.word_swaps.word_swap_wordnet

"""
Word Swap by swapping synonyms in WordNet
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"""


import nltk
from nltk.corpus import wordnet

import textattack

from .word_swap import WordSwap


[docs]class WordSwapWordNet(WordSwap): """Transforms an input by replacing its words with synonyms provided by WordNet. >>> from textattack.transformations import WordSwapWordNet >>> from textattack.augmentation import Augmenter >>> transformation = WordSwapWordNet() >>> augmenter = Augmenter(transformation=transformation) >>> s = 'I am fabulous.' >>> augmenter.augment(s) """ def __init__(self, language="eng"): nltk.download("omw-1.4") if language not in wordnet.langs(): raise ValueError(f"Language {language} not one of {wordnet.langs()}") self.language = language def _get_replacement_words(self, word, random=False): """Returns a list containing all possible words with 1 character replaced by a homoglyph.""" synonyms = set() for syn in wordnet.synsets(word, lang=self.language): for syn_word in syn.lemma_names(lang=self.language): if ( (syn_word != word) and ("_" not in syn_word) and (textattack.shared.utils.is_one_word(syn_word)) ): # WordNet can suggest phrases that are joined by '_' but we ignore phrases. synonyms.add(syn_word) return list(synonyms)